A polishing device

Abstract

The utility model discloses a polishing device, including the machine case, the inside fixedly connected with the step motor of machine case, the top fixedly connected with the working disc of hollow structure of step motor output shaft, the inside fixedly connected with two servo motors of working disc, the top of two servo motor output shafts all are fixedly connected with the air pipe, the inside of working disc is equipped with the air inlet chamber, and the top of two air pipes is fixedly interconnected respectively with the inner polishing sleeve and outer polishing sleeve, the inner wall of inner polishing sleeve and the outer wall of outer polishing sleeve all are fixedly embedded with rubber inflatable sleeve. The utility model discloses a flexible clamping of non - damage of connecting rod copper cover is realized through the rubber inflatable sleeve of pneumatic expansion, avoids the deformation and the indentation caused by traditional mechanical clamping, realizes the synchronous polishing of the outer wall and the inner wall of connecting rod copper cover, drives the rotation of inner and outer polishing sleeve through two servo motors, and the initiative of two polishing heads is cooperated, and the efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of polishing technology, and in particular to a polishing device. Background Technology

[0002] Connecting rod bushings are sliding bearing bushings installed in the small or large end bores of engine connecting rods. They are usually made of wear-resistant copper alloys such as tin bronze and aluminum bronze, and are used to reduce friction and wear between the connecting rod and the piston pin or crankshaft. Because burrs, minor deformations, surface scratches, or oxide layers are easily generated on the inner and outer walls of the bushings during press-fitting, boring, or transportation, if they are not polished, it will lead to uneven fit clearance, local stress concentration, poor lubrication, or even premature seizing failure. Therefore, it is necessary to remove defects and improve surface finish through polishing to ensure reliable operation and long service life under high load and high speed reciprocating motion conditions.

[0003] In the existing connecting rod copper sleeve grinding process, manual hand-held grinding wheels or single-function equipment are commonly used to process the inner and outer walls separately. The operation relies on experience, the grinding force is difficult to control, and it is easy to cause scratches on the copper sleeve surface, dimensional deviations, or local overheating and annealing. At the same time, grinding of the inner and outer walls usually requires multiple disassembly and reassembly and machine changes, which is inefficient. Therefore, we propose a grinding device to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a grinding device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A polishing device includes a housing. A stepper motor is fixedly connected inside the housing. A hollow working plate is fixedly connected to the top of the output shaft of the stepper motor. Two servo motors are fixedly connected inside the working plate. An air inlet pipe is fixedly connected to the top of the output shaft of each of the two servo motors. An air inlet chamber is opened inside the working plate. An inner polishing sleeve and an outer polishing sleeve are fixedly connected to the top of the two air inlet pipes, respectively. A rubber air expansion sleeve is fixedly embedded in the inner wall of the inner polishing sleeve and the outer wall of the outer polishing sleeve. An air passage is opened inside the inner polishing sleeve and the outer polishing sleeve. A vertical pipe is fixedly connected to the top of the working plate. A rotary joint is fixedly connected to the top of the vertical pipe. An air pump is fixedly connected to the outer wall of the rotary joint. A polishing assembly is provided inside the housing.

[0007] Preferably, the grinding assembly includes two cylinders, the top of the housing is fixedly connected to the outer wall of the two cylinders, the bottom of the output end of each of the two cylinders is fixedly connected to a mounting plate, the outer wall of each of the two mounting plates is fixedly connected to a grinding motor, the bottom of the output shaft of each of the two grinding motors is fixedly connected to a grinding head, the output shaft of the grinding motor drives the grinding head to rotate at high speed to grind the connecting rod copper sleeve, and existing dust removal equipment can be added to the grinding area.

[0008] Preferably, the outer wall of the chassis has a circular hole, and the inner wall of the circular hole is rotatably connected to the outer wall of the stepper motor output shaft.

[0009] Preferably, the inner wall of the air intake chamber has four mounting holes, two of which are rotatably connected to the outer walls of the output shafts of two servo motors, and the inner walls of the mounting holes are equipped with existing mechanical seals to prevent air leakage.

[0010] Preferably, the inner walls of the other two mounting holes are rotatably connected to the outer walls of the two air intake pipes, respectively.

[0011] Preferably, the top of the chassis has a through hole, and the inner wall of the through hole is rotatably connected to the outer wall of the vertical pipe.

[0012] Preferably, the top of the chassis has two sliding holes, and the inner walls of the two sliding holes are slidably connected to the outer walls of the output ends of the two cylinders, respectively.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] This solution achieves non-damaging flexible clamping of the connecting rod copper sleeve through pneumatically expanded rubber air sleeves, avoiding deformation and indentation caused by traditional mechanical clamping, and enabling synchronous grinding of the outer and inner walls of the connecting rod copper sleeve; by driving the inner and outer grinding sleeves to rotate through two servo motors, and cooperating with the active feed of two grinding heads, efficiency is improved. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of a grinding device proposed in this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of a grinding device proposed in this utility model;

[0018] Figure 3This is a three-dimensional cross-sectional view of the inner grinding sleeve of the grinding device proposed in this utility model.

[0019] Figure 4 This is a three-dimensional cross-sectional view of the outer grinding sleeve of the grinding device proposed in this utility model.

[0020] In the diagram: 1. Chassis; 2. Stepper motor; 3. Working plate; 4. Servo motor; 5. Air inlet chamber; 6. Air inlet pipe; 7. Inner grinding sleeve; 8. Outer grinding sleeve; 9. Rubber air expansion sleeve; 10. Air passage; 11. Vertical pipe; 12. Rotary joint; 13. Cylinder; 14. Mounting plate; 15. Grinding motor; 16. Grinding head. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] Depend on Figures 1-4 As shown, a grinding device is disclosed, including a housing 1. A stepper motor 2 is fixedly connected inside the housing 1. A circular hole is opened on the outer wall of the housing 1. The inner wall of the circular hole is rotatably connected to the outer wall of the output shaft of the stepper motor 2. A hollow working disk 3 is fixedly connected to the top of the output shaft of the stepper motor 2. The output shaft of the stepper motor 2 drives the working disk 3 to reciprocate at ±180°, thereby avoiding the tangling of the power and signal lines of the servo motor 4.

[0023] The working disc 3 has two servo motors 4 fixedly connected inside. The outer wall of the output shaft of the stepper motor 2 and the servo motor 4 is equipped with an existing encoder to detect the angular position and angular velocity of the output shaft. The top of the output shaft of the two servo motors 4 is fixedly connected with an air inlet pipe 6. The outer wall of the air inlet pipe 6 has an air inlet hole. The air inlet pipe 6 can stably deliver the gas in the air inlet chamber 5 to the air passage 10 of the inner grinding sleeve 7 and the outer grinding sleeve 8, providing a channel for the rubber air expansion sleeve 9 to be inflated.

[0024] The working plate 3 has an air intake chamber 5 inside, which provides a buffer and channel for gas distribution. The inner wall of the air intake chamber 5 has four mounting holes. The inner walls of two mounting holes are rotatably connected to the outer walls of the output shafts of the two servo motors 4, and the inner walls of the other two mounting holes are rotatably connected to the outer walls of the two air intake pipes 6.

[0025] The tops of the two air intake pipes 6 are respectively fixedly connected to an inner polishing sleeve 7 and an outer polishing sleeve 8. The inner wall of the inner polishing sleeve 7 and the outer wall of the outer polishing sleeve 8 are both fixedly inlaid with rubber air expansion sleeves 9. The rubber material of the rubber air expansion sleeves 9 has good elasticity. After inflation, it can closely fit the inner and outer walls of the connecting rod copper sleeve, achieving flexible clamping and avoiding scratches on the surface of the connecting rod copper sleeve caused by traditional rigid clamping. The inflated air expansion sleeve has a large contact area with the copper sleeve, clamping firmly and ensuring that the connecting rod copper sleeve does not slip relative to each other during the polishing process.

[0026] Both the inner grinding sleeve 7 and the outer grinding sleeve 8 have air passages 10 inside. The air passages 10 are used to guide gas into the rubber air expansion sleeve 9. The top of the working plate 3 is fixedly connected to the vertical pipe 11. The top of the machine box 1 has a through hole. The inner wall of the through hole is rotatably connected to the outer wall of the vertical pipe 11. The top of the vertical pipe 11 is fixedly connected to the rotary joint 12. The outer wall of the rotary joint 12 is fixedly connected to the air pump through the existing pipeline. A three-way solenoid valve is added to the pipeline for depressurization and exhaust.

[0027] The machine housing 1 is equipped with a grinding assembly, which includes two cylinders 13. Two sliding holes are opened on the top of the machine housing 1. The inner walls of the two sliding holes are slidably connected to the outer walls of the output ends of the two cylinders 13, respectively. The top of the machine housing 1 is fixedly connected to the outer walls of the two cylinders 13. Mounting plates 14 are fixedly connected to the bottom of the output ends of the two cylinders 13. Grinding motors 15 are fixedly connected to the outer walls of the two mounting plates 14. Grinding heads 16 are fixedly connected to the bottom of the output shafts of the two grinding motors 15. The output shafts of the grinding motors 15 drive the grinding heads 16 to rotate at high speed, providing the core power for the grinding operation.

[0028] Working principle: When grinding the connecting rod copper sleeve, the copper sleeve to be processed is first fitted onto the outer wall of the inner grinding sleeve 7 and the inner wall of the outer grinding sleeve 8 respectively. The air pump is started to supply air to the vertical pipe 11 through the rotary joint 12. The air enters the two air inlet pipes 6 through the air inlet chamber 5 in the working plate 3 respectively. Then, the two rubber air expansion sleeves 9 are filled through the air passages 10 inside the inner grinding sleeve 7 and the outer grinding sleeve 8, so that they expand and tightly fit the inner and outer walls of the two connecting rod copper sleeves to achieve clamping.

[0029] Subsequently, the two cylinders 13 are activated, and their output ends move down along the sliding hole at the top of the housing 1, driving the mounting plate 14 and the grinding motor 15 fixed thereon to descend synchronously, so that the two grinding heads 16 are respectively aligned with the inside or exposed area of ​​the connecting rod copper sleeve. As the two grinding motors 15 operate, they drive the two grinding heads 16 to rotate at high speed, respectively grinding the inner and outer walls of the two connecting rod copper sleeves.

[0030] At the same time, two servo motors 4 start, driving the two air intake pipes 6, the inner polishing sleeve 7 and the outer polishing sleeve 8 to rotate through their output shafts, and working with the polishing head 16 to polish the connecting rod copper sleeve. To prevent the power and signal lines of the servo motors 4 from getting tangled during continuous rotation, the stepper motor 2 drives the working disk 3 to rotate back and forth at a set angle, such as ±180°, instead of rotating continuously in one direction. Both the output shaft of the stepper motor 2 and the output shaft of the servo motor 4 are equipped with encoders to provide real-time feedback of position and speed signals, ensuring coordinated and safe movement.

[0031] It should be noted that when actually put into use, an existing PLC controller can be added. The PLC controller is electrically connected to the stepper motor 2, servo motor 4, cylinder 12, grinding motor 15, and encoder to facilitate the control of the overall operation.

[0032] All standard parts used in this utility model can be purchased from the market. Irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. Furthermore, the structure and principle of the components known to those skilled in the art can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0033] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A polishing apparatus, comprising a housing (1), characterized in that, A stepper motor (2) is fixedly connected inside the chassis (1). A hollow working disk (3) is fixedly connected to the top of the output shaft of the stepper motor (2). Two servo motors (4) are fixedly connected inside the working disk (3). An air inlet pipe (6) is fixedly connected to the top of the output shaft of each of the two servo motors (4). An air inlet chamber (5) is opened inside the working disk (3). An inner grinding sleeve (7) and an outer grinding sleeve are fixedly connected to the top of the two air inlet pipes (6). The inner wall of the inner polishing sleeve (7) and the outer wall of the outer polishing sleeve (8) are both fixedly inlaid with rubber air expansion sleeves (9). The inner polishing sleeve (7) and the outer polishing sleeve (8) are both provided with air passages (10). The top of the working plate (3) is fixedly connected to a vertical pipe (11). The top of the vertical pipe (11) is fixedly connected to a rotary joint (12). The outer wall of the rotary joint (12) is fixedly connected to an air pump. The machine box (1) is provided with a polishing assembly inside.

2. The polishing device according to claim 1, characterized in that, The grinding assembly includes two cylinders (13). The top of the housing (1) is fixedly connected to the outer wall of the two cylinders (13). Mounting plates (14) are fixedly connected to the bottom of the output ends of the two cylinders (13). Grinding motors (15) are fixedly connected to the outer walls of the two mounting plates (14). Grinding heads (16) are fixedly connected to the bottom of the output shafts of the two grinding motors (15).

3. The polishing device according to claim 1, characterized in that, The outer wall of the chassis (1) has a circular hole, and the inner wall of the circular hole is rotatably connected to the outer wall of the output shaft of the stepper motor (2).

4. A polishing device according to claim 1, characterized in that, The inner wall of the air intake chamber (5) is provided with four mounting holes, two of which are rotatably connected to the outer walls of the output shafts of the two servo motors (4).

5. A polishing device according to claim 1, characterized in that, The inner walls of the other two assembly holes are rotatably connected to the outer walls of the two air intake pipes (6).

6. A polishing device according to claim 1, characterized in that, The top of the chassis (1) is provided with a through hole, and the inner wall of the through hole is rotatably connected to the outer wall of the vertical pipe (11).

7. A polishing device according to claim 2, characterized in that, The top of the chassis (1) has two sliding holes, and the inner walls of the two sliding holes are slidably connected to the outer walls of the output ends of the two cylinders (13).

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